Cardiovascular Medicine Book

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QRS ComplexAka: QRS Duration

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  1. See Also
    1. R Wave
  2. Normal findings: Duration
    1. Limb leads (I, II, III): 0.05 to 0.10
    2. Precordial leads (V1 to V6): 0.06 to 0.12
  3. Prolonged QRS complex (over 0.12)
    1. Abnormal interventricular conduction
  4. Low QRS amplitude (<5 mm in limb leads)
    1. Diffuse Coronary Artery Disease
    2. Congestive Heart Failure
    3. Pericardial Effusion
    4. Myxedema
    5. Amyloidosis
    6. Obesity
    7. Emphysema (�OPD)
    8. Anasarca
  5. High QRS amplitude
    1. Evaluate for Left Ventricular Hypertrophy

QRS complex duration (C0429025)

ConceptsOrganism Attribute (T032)
EnglishQRS complex duration, QRS duration
Spanishduracion del complejo QRS
Parent ConceptsQRS complex feature (C0429097)
SourcesLNC, SCTSPA, SNOMEDCT
Derived from the NIH UMLS (Unified Medical Language System)


QRS complex feature (C0429097)

Definition (NCI)QRS complex is a portion of the EKG tracing that represents depolarization of the ventricular myocardium. Normally the ventricles are activated simultaneously.
ConceptsFinding (T033)
EnglishEKG QRS Complex, QRS complex, QRS complex feature
Spanishcaracteristica del complejo QRS, complejo QRS
Parent ConceptsEKG Concept (C1880437), ECG waveform (C0428732), Duplicate concept (C1274013)
SourcesLNC, NCI, SCTSPA, SNOMEDCT
Derived from the NIH UMLS (Unified Medical Language System)



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